A piezoelectric ceramic speaker sound transmission device

Abstract

The present invention relates to a piezoelectric ceramic speaker sound transmission device, including a ceramic sound generator, one end of which is connected to an audio tuner through a connecting tube; the structure of the ceramic sound generator is: including a front cover and a rear cover, the front cover and the rear cover are connected to form a sealed chamber, a fitting vibration plate is provided in the sealed chamber, a piezoelectric ceramic speaker unit is provided on the plate, and an electrical signal input terminal electrically connected to the piezoelectric ceramic speaker unit is installed on the rear cover. The present invention has a compact and reasonable structure and is easy to operate. It utilizes the excellent performance of piezoelectric ceramics to convert electrical signals into mechanical energy, and the piezoelectric ceramic sheet is attached to the thin film sounding vibration plate, which is deformed under the action of force and generates a large fluctuation amplitude; the loss during transmission is low and the anti-interference ability is strong.

Description

Technical Field

[0001] The present invention relates to the technical field of piezoelectric ceramic speakers, and in particular to a piezoelectric ceramic speaker sound transmission device formed by a piezoelectric ceramic speaker and an air duct. Background Art

[0002] Most of the active sound-generating equipment are system devices composed of different materials and a large amount of metal structures with electronic circuits and power supply equipment. In some special occasions, such as high electric field and high magnetic field environments, a large or small amount of sound-generating devices with metal structures, such as microphones, headphones and other sound transmission equipment, will interfere with each other in high electric field and high magnetic field environments, and even produce shielding, making it impossible to hear the sound in such special occasions or special equipment spaces, affecting normal communication.

[0003] Piezoelectric ceramic speaker technology is able to produce sound in a closed structure cavity, while traditional speakers are large in size, have weak instantaneous dynamics, require a large chamber, and cannot produce good effects in a closed structure. However, existing piezoelectric ceramic speaker sound transmission devices contain metal materials and electrical signals such as micro voltage and micro current, which will interfere with each other and affect the function. Summary of the invention

[0004] In view of the above shortcomings in the prior art, the applicant provides a piezoelectric ceramic speaker sound transmission device with a reasonable structure, so as to improve the anti-interference ability in high electric field and high magnetic field environment.

[0005] The technical solution adopted by the present invention is as follows:

[0006] A piezoelectric ceramic speaker sound transmission device includes a ceramic sound generator, one end of which is connected to an audio tuner through a connecting tube; the structure of the ceramic sound generator is as follows: it includes a front cover and a rear cover, the front cover and the rear cover are connected to form a sealed chamber, a fitting vibration plate is provided in the sealed chamber, a piezoelectric ceramic speaker unit is provided on the plate, and an electrical signal input terminal electrically connected to the piezoelectric ceramic speaker unit is installed on the rear cover.

[0007] As a further improvement of the above technical solution:

[0008] The laminated vibration plate is in the form of a thin film, and its structure is as follows: it includes a fixed bracket of an outer ring, in which a first sound-producing vibration plate with a hollow middle portion is installed, the first sound-producing vibration plate has a hole, and the piezoelectric ceramic speaker unit is installed in the hole through a reinforcing bracket; the piezoelectric ceramic speaker unit includes a sound-amplifying tweeter and a second sound-producing vibration plate arranged adjacent to each other, the front and rear surfaces of the second sound-producing vibration plate are respectively connected to piezoelectric ceramic sheets through signal lines, and the two piezoelectric ceramic sheets are connected in parallel in the circuit; the sound-amplifying tweeter is in the shape of a cap, and its middle portion is laminated to the central portion of the piezoelectric ceramic sheet.

[0009] The electrical signal input end comprises a signal input PCB board on which a signal matching resistor is arranged.

[0010] The structure of the audio tuner is as follows: it includes a cavity, and the two ends of the cavity are respectively fixed with air nozzle covers to form a closed structure; an audio diverter is arranged in the cavity, and the audio diverter is in the shape of a hollow tube, and concave arc-shaped grid plates are arranged on the two end surfaces, and a plurality of through holes are opened on the grid plates, and tuning screens are respectively arranged at the two ends of the audio diverter.

[0011] The air nozzle fixing cover comprises a cover body, and the cover body is provided with a tubular connecting nozzle connected to the other end of the connecting pipe.

[0012] The tuning screen is made of PC material, and many small holes are evenly distributed on the tuning screen.

[0013] A conical groove is arranged in the front cover, and a connecting hole connected with one end of the connecting pipe is arranged in the middle of the bottom surface of the conical groove.

[0014] The connecting pipe is PVC, PU or PEI pipe.

[0015] The front cover, the fitted vibration plate and the rear cover are connected as a whole through bolts, and sealing gaskets are respectively arranged between the fitted vibration plate and the front cover and the rear cover.

[0016] The beneficial effects of the present invention are as follows:

[0017] The present invention has a compact and reasonable structure and is easy to operate. It utilizes the excellent properties of piezoelectric ceramics to convert electrical signals into mechanical energy, and adheres the piezoelectric ceramic sheet to a thin film sound-generating vibration plate, which deforms under the action of force and generates a large fluctuation amplitude. The transmission process has low loss and strong anti-interference ability.

[0018] The changing wave force is generated by the changing electric energy, which is pushed by compressed air and conducted by connecting pipes. The connecting pipes are made of non-metallic materials with good anti-interference effect. They are suitable for working in high magnetic fields and high electric fields. It is a piezoelectric ceramic speaker sound transmission device that is energy-saving and environmentally friendly, light in size, and highly dynamic. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention.

[0020] Figure 2 It is an exploded view of the ceramic sound generator of the present invention.

[0021] Figure 3 It is an exploded view of the audio tuner of the present invention.

[0022] Figure 4 FIG. 4 is an exploded view of the piezoelectric ceramic speaker unit of the present invention.

[0023] Figure 5 It is an exploded view of the electrical signal input terminal of the present invention.

[0024] In the figure: 1. Ceramic sound generator; 2. Connecting tube; 3. Audio tuner; 4. Back cover; 5. Piezoelectric ceramic speaker unit; 6. Sealing gasket; 7. Front cover; 8. Electrical signal input terminal; 9. Audio shunt; 10. Cavity; 11. Tuning screen; 12. Air nozzle fixing cover; 13. Fitting vibration plate; 51. Amplifying tweeter; 52. Second pronunciation vibration plate; 53. Piezoelectric ceramic sheet; 131. Fixed bracket; 132. First pronunciation vibration plate; 133. Strengthening bracket; 701. Conical groove; 702. Connecting hole; 81. Signal input PCB board; 82. Signal matching resistor; 901. Grid plate; 902. Through hole; 121. Cover body; 122. Connecting nozzle. DETAILED DESCRIPTION

[0025] The specific implementation of the present invention will be described below in conjunction with the accompanying drawings.

[0026] like Figure 1 and Figure 2 As shown, the piezoelectric ceramic speaker sound transmission device of this embodiment includes a ceramic sound generator 1, one end of which is connected to an audio tuner 3 through a connecting tube 2; the structure of the ceramic sound generator 1 is as follows: it includes a front cover 7 and a rear cover 4, which form a sealed chamber after being connected with the front cover 7 and the rear cover 4, in which a fitting vibration plate 13 is provided, on which a piezoelectric ceramic speaker unit 5 is provided, and an electrical signal input terminal 8 electrically connected to the piezoelectric ceramic speaker unit 5 is installed on the rear cover 4.

[0027] like Figure 4 As shown, the laminated vibration plate 13 is in the form of a thin film, and its structure is as follows: it includes an outer ring fixed bracket 131, in which a first sound-producing vibration plate 132 with a hollow middle portion is installed, a hole is opened on the first sound-producing vibration plate 132, and a piezoelectric ceramic speaker unit 5 is installed in the hole through a reinforcing bracket 133; the piezoelectric ceramic speaker unit 5 includes an adjacently arranged amplifying tweeter 51 and a second sound-producing vibration plate 52, the front and rear surfaces of the second sound-producing vibration plate 52 are respectively connected to piezoelectric ceramic sheets 53 through signal lines, and the two piezoelectric ceramic sheets 53 are connected in parallel in the circuit; the amplifying tweeter 51 is in the shape of a cap, and the middle portion thereof is a plane.

[0028] like Figure 5 As shown, the electrical signal input terminal 8 includes a signal input PCB board 81 on which a signal matching resistor 82 is provided.

[0029] like Figure 3As shown, the structure of the audio tuner 3 is as follows: it includes a cavity 10, and both ends of the cavity 10 are respectively connected to a closed structure by an air nozzle fixing cover 12; an audio diverter 9 is arranged in the cavity 10, and the audio diverter 9 is in a hollow tubular shape, and an inwardly concave arc-shaped grid plate 901 is formed on its two end surfaces, and a plurality of through holes 902 are opened on the grid plate 901, and tuning screens 11 are respectively arranged at both ends of the audio diverter 9.

[0030] The air nozzle fixing cover 12 comprises a cover body 121 , on which a tubular connecting nozzle 122 connected to the other end of the connecting pipe 2 is provided.

[0031] The tuning screen 11 is made of PC material, and many small holes are evenly distributed on the tuning screen 11.

[0032] A conical groove 701 is provided in the front cover 7 , and a connecting hole 702 connected to one end of the connecting pipe 2 is provided in the middle of the bottom surface of the conical groove 701 .

[0033] The connecting pipe 2 is a PVC, PU or PEI pipe.

[0034] The front cover 7 , the fitted vibration plate 13 and the rear cover 4 are connected as a whole by bolts, and sealing gaskets 6 are respectively provided between the fitted vibration plate 13 and the front cover 7 and the rear cover 4 .

[0035] Design principle of the present invention:

[0036] The ceramic sound generator 1 is the sound-generating part of the present invention. The frequency of the sound generator (such as music signal, MIC vocal signal) is input into the piezoelectric ceramic speaker unit 5 through the amplifier as a changing electrical signal. The piezoelectric ceramic speaker unit 5 is a sound-generating component. The component uses the electrical signal to generate large and small amplitude effects, generates air compression in the sealed chambers of the front cover and the rear cover, sends out audio, and outputs it to the audio tuner 3 through air conduction of the connecting tube 2.

[0037] During the implementation of the present invention, the piezoelectric ceramic speaker unit 5 is the sound-producing component of the present technical solution. The two piezoelectric ceramic sheets 53 are connected in parallel in the circuit. The piezoelectric ceramic speaker unit 5 is supplied with an electrical signal through the electrical signal input terminal 8 to generate a large and small amplitude effect of horizontal motion, thereby generating a high-frequency audio. A high-frequency amplified signal is pushed out to the audio tuner 3 through the sealed chamber formed by the front cover 7 and the rear cover 4 and the connecting tube 2. The audio signal is rectified through the tuning screen 11 of the audio tuner 3 and is diverted through the through hole 902 on the grid plate 901 of the audio diverter 9, thereby reducing the loss of audio in transmission and solving the problems of low-frequency echo and low-frequency resonance.

[0038] The above description is an explanation of the present invention, not a limitation of the present invention. The scope of the present invention is defined in the claims. Any form of modification may be made within the scope of protection of the present invention.

Claims

1. A piezoelectric ceramic speaker sound transmission device, characterized in that: It comprises a ceramic sound generator (1), one end of which is connected to an audio tuner (3) via a connecting tube (2); The structure of the ceramic sound generator (1) is as follows: it comprises a front cover (7) and a rear cover (4); the front cover (7) and the rear cover (4) are butt-jointed to form a sealed chamber; a fitted vibration plate (13) is provided in the sealed chamber, on which a piezoelectric ceramic speaker unit (5) is provided; an electrical signal input terminal (8) electrically connected to the piezoelectric ceramic speaker unit (5) is installed on the rear cover (4); The laminating vibration plate (13) is in the form of a thin film, and has the following structure: it comprises an outer ring fixed bracket (131), in which a first sound-generating vibration plate (132) is installed; a hole is opened on the first sound-generating vibration plate (132), and the piezoelectric ceramic speaker unit (5) is installed in the hole via a reinforcing bracket (133); The piezoelectric ceramic speaker unit (5) comprises a sound amplifying tweeter (51) and a second sound-generating vibration plate (52) which are arranged adjacently and in parallel. The front and rear surfaces of the second sound-generating vibration plate (52) are respectively connected to a piezoelectric ceramic sheet (53) via a signal line. The two piezoelectric ceramic sheets (53) are connected in parallel in a circuit. The sound amplifying tweeter (51) is in a cap shape, and its middle portion is attached to the central portion of the piezoelectric ceramic sheet 53. The structure of the audio tuner (3) is as follows: it comprises a cavity (10), and the two ends of the cavity (10) are respectively connected by air nozzle fixing covers (12) to form a closed structure; an audio diverter (9) is arranged in the cavity (10), and the audio diverter (9) is in the shape of a hollow tube, and its two end surfaces are respectively provided with inwardly concave arc-shaped grid plates (901), and the grid plates (901) are provided with a plurality of through holes (902); and tuning screens (11) are respectively arranged at the two ends of the audio diverter (9).

2. The piezoelectric ceramic speaker sound transmission device according to claim 1, characterized in that: The electric signal input terminal (8) comprises a signal input PCB board (81) on which a signal matching resistor (82) is arranged.

3. The piezoelectric ceramic speaker sound transmission device according to claim 1, characterized in that: The air nozzle fixing cover (12) comprises a cover body (121), and the cover body (121) is provided with a tubular connecting nozzle (122) connected to the other end of the connecting pipe (2).

4. The piezoelectric ceramic speaker sound transmission device according to claim 1, characterized in that: The tuning screen (11) is made of PC material, and a large number of small holes are evenly distributed on the tuning screen (11).

5. The piezoelectric ceramic speaker sound transmission device according to claim 1, characterized in that: The front cover (7) is provided with a conical groove (701) in its interior, and a connecting hole (702) connected to one end of the connecting pipe (2) is provided in the middle of the bottom surface of the conical groove (701).

6. The piezoelectric ceramic speaker sound transmission device according to any one of claims 1 to 5, characterized in that: The connecting pipe (2) is a PVC, PU or PEI pipe.

7. The piezoelectric ceramic speaker sound transmission device according to claim 6, characterized in that: The front cover (7), the fitted vibration plate (13) and the rear cover (4) are connected as a whole by bolts, and sealing gaskets (6) are respectively provided between the fitted vibration plate (13) and the front cover (7) and the rear cover (4).

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